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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: shekharbadam on February 08, 2009, 10:02:49 AM

Title: enthalpy
Post by: shekharbadam on February 08, 2009, 10:02:49 AM

hi, could you tell me how to calculate the enthalpy of N2H4 (hydrazine) from nitrogen and hydrogen gases?

Title: Re: enthalpy
Post by: Hello12 on February 09, 2009, 12:32:06 PM

N2+2H2>>>>>N2H4. You need to find the delta H value for N2H4, 2H2 and N2. Then just apply Hess Law. So delta Hx= delta H1 (N2)+ 2delta H2(2H2)- delta H3(N2H4)